hamilton



(No Model.) I

C. J.. HAMILTON.

PUMP.

No. 270.789. Patented Jan. 16,1883.

UNITED STATES PATENT OFFICE.

CLARENCE J. HAMILTON, OF PLYMOUTH, MICHIGAN.

PUMP.

SPECIFICATION forming part of Letters Patent No. 270,789, dated January 16, 1883.

Application filed August 31, 188:2.

To all whom it may concern Be it known that I, CLARENCE J. HAMIL- TON, of Plymouth, in the county ot' \Vayne and State ofA Michigan, have invented new and usel'ul Improvements in Pumps; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, which forms a part of this specification.

The nature of this invention relates to certain new and useful improvements in the construction of pumps particularly designed to be operated by windmills.

The invention consists in the peculiar construction, arrangement, and various combinations of the parts, all as more fully hereinafter set forth.

In the accompanying drawing, iu which my invention is shown in a vertical central section, A represents the stand-pipe, in which is formed the pump-cylinder B, and which is provided with a piston or plunger, C, at thelower end of the pump-rod D, which extends upward through the stand-pipe, and is reciprocated by the windmill or other suitable means.

E represents the suction or inlet pipe, extending below the cylinder B, and between them is placed a. valve, a.

- F is a short stand-pipe connected with the cylinder B, near the lower end thereof, and is again connected with the cylinder near its upper end, as shown, while the upper end of the pipe F terminates in an air-chamber, G. Near the lower endv of this pipe F is arranged a valve, b.

In operation, on 'the upward stroke of the plunger, water is drawn into the cylinder through the suction-pipe. On the return or down stroke the water in the cylinder closes the valve c, and is forced into the stand-pipe (No model.)

F, through the same, and back into the standpipe A, above the plunger, the expansion of' the air in the air-chamber'causing a continuous tlow ot' water'iuto the main stand-pipe during the return or downward stroke of the piston.

It will be observed that on the downward stroke the only function performed by the piston is to force the water in the cylinder below it into the pipe F, but that on the upstroke it replenishes the water in such cylinder by suction, while it also lifts the column ot water standing above it in the stand-pipe, causing it to discharge at the spout or upper end. By this construction I am enabled to use a much lighter pumprod thin in those constructions wherein the pum p-rod must force the plunger down and push the column ot' water in the stand-pipe ahead ot' it.

I am aware of latent No. 2l3,309, and do notvclaim anything shown therein.

What I claim as my invention is- 1. A pump wherein the pumpcylinder is provided with a solid plunger, in combination with a water-way outside ot' such cylinder, and

a valveless air-chamber constructed to force water into the purnp-cylii-ider above the plunl 

